低磷精料补充料对奶牛生产性能及繁殖性能的影响

Effects of Low P Concentrate Supplenment on Milk and Reproductive Performance in Dairy Cows

选用体况良好、产奶量约30 kg、怀孕天数接近的奶牛26头,平均分成2组,自由采食、饮水,分别饲喂低磷精料补充料(0.35%)和对照精料补充料(0.58%),研究低磷精料补充料对泌乳奶牛生产性能及繁殖性能的影响。试验期为4个月,结果表明,低磷精料补充料对泌乳奶牛的生产性能没有显著影响(P>0.05);低磷精料补充料对奶牛首次发情天数、受胎率、输精次数等影响不显著,但试验组奶牛胎衣不下的发病率显著低于对照组(P<0.05);低磷精料补充料每天可以降低奶牛的饲养成本0.6元·头-1。

In order to study the effects of Low P concentrate supplenment on milk and reproductive performance in dairy cows,twenty-six healthy with milk 30 kg yield,days of pregnancy were selected and randomly assianed to two groups with thirteen heads per groups.The experiment cows were fed concentrations with two levels P,which were 0.35%and 58%(dry matter basis).Feed and water were provided ad libitum.The experiment lasted for four months.The result showed that the milk performance,milk fat,milk protein,somatic cell count,urea nutrigon of dairy cows were no significantly affected by low P concentrate supplenment(P>0.05).The first estrus days,conception rate,number of insemination were no significantly affected by low P concentrate supplenment,but the metritis of cows was significantly dicreased when compared with the control group(P<0.05).The feeding cost of dairy cows was declined 0.6 yuan·head-1,when P of concentrate supplement was dicreased.